Browsing by Author "Zahran, R. R"

Now showing items 1-7 of 7

    • Amorphous Phase Properties Of Oriented Polyethylene Solids 

      Zahran, R. R; Kardos, J. L. ( Qatar University , 1993 , Article)
      Solid-state deformation of polyethylene results in a preferential orientation of both crystalline and amorphous regions. Usually, one major problem in the prediction of the mechanical and thermal expansion properties of ...

    • Analysis of the thermal expansion behavior of oriented polyoxymethylene sheets 

      Zahran, R. R.; Shenouda, S. S.; El-Tawil, Y. A.; El-Kayar, A. ( Wiley Subscription Services, Inc., A Wiley Company , 1996 , Article)
      The applicability of the molecular composite model is extended to include the analysis of the thermal expansion behavior of oriented (anisotropic) polyoxymethylene. The model accounts for changes in the morphological and ...

    • Correlations Of Some Tensile Properties For Various Grades Of Low Density Polyethylene 

      Zahran, R. R; Kandeil, A. Y. ( Qatar University , 1994 , Article)
      The tensile properties of nine different grades of low density polyethylene were measured, and the relationships resulting from the combination of different pairs of properties were analyzed. It was found that some properties ...

    • Electrical Conductivity Of Aluminum Reinforced Graphite Electrodes 

      Zahran, R. R ( Qatar University , 1993 , Article)
      Composite, disc-like aluminum reinforced graphite electrodes were prepared, and an integrated parametric analysis has been performed to investigate the effect of some processing parameters on the electrical conductivity ...

    • Structure-thermal expansivity relation for isotropic polyoxymethylene sheets 

      Zahran, R. R.; Abolmagd, A. A. ( John Wiley & Sons, Ltd. , 1994 , Article)
      A detailed parametric mapping analysis of the thermal expansion coefficient for isotropic polyoxymethylene is presented. The molecular composite model has been computerized to investigate the variation of the thermal ...

    • Thermal dimensional stability of isotropic polyoxymethylene 

      Zahran, R. R.; Abolmagd, A. A. ( John Wiley & Sons, Ltd. , 1991 , Article)
      A parametric mapping analysis of the effect of various structural and morphological parameters on the thermal dimensional stability of polyoxymethylene is highlighted. The molecular composites model is found to describe ...

    • Ultrasonic and thermal properties of γ-irradiated low-density polyethylene 

      Zahran, R. R.; Kandeil, A. Y.; Higazy, A. A.; Kassem, M. E. ( John Wiley & Sons, Inc. , 1993 , Article)
      The ultrasonic pulse-echo technique and differential thermal analysis were utilized to characterize and to monitor the effect of ?-irradiation on the sonic modulus and the heat effect of low-density polyethylene. The sonic ...